Texas is the other megastate—California (1st) and Florida (3rd) being the others.
Houston lacks a theme park.
Maybe somewhere in the Houston area, towards Austin but not too far from Houston's airport.
Houston is about 1,000 miles from WDW.
Houston is about 1,500 miles from Disneyland.
It's still pretty cheap and easy to build big in Texas. NIMBYism isn't the norm in the Houston area yet.
Galveston is a major cruise port. It's 51 miles from Houston.
Port Canaveral is 60 miles from WDW.
You could have a WDW-Port Canaveral arrangement for DCL.
I have no idea what kind of park they'd build, however. Probably not another castle park.
Maybe a resort with an "IP portals" park like Epic Universe, a water park, resort hotels, shopping, golf, etc. Maybe another park if it's a hit.